Should small businesses charge a late payment fee

Deciding whether to charge late payment fees is a common dilemma for UK small business owners and freelancers. On one hand, it’s your legal right and can help protect your cash flow. On the other, there's a natural concern about damaging client relationships. This guide provides a practical look at your rights, the pros and cons, and a sensible framework for when and how to apply late payment charges for your UK business.

The Legal Right to Charge for Late Payment in the UK

For business-to-business (B2B) transactions in the UK, your right to charge for late payments isn't just a contractual matter—it's enshrined in law. The key piece of legislation is the Late Payment of Commercial Debts (Interest) Act 1998.

This Act gives you a statutory right to claim interest and a fixed compensation sum if a commercial client pays your invoice late. This applies even if you haven't explicitly mentioned late payment fees in your contract.

The Act sets out two distinct charges you can apply:

1. Statutory Interest: A percentage-based interest charge on the outstanding amount.
2. Fixed Sum Compensation: A one-off charge to cover the cost of recovering the debt.

These rights automatically apply to the sale of goods or services between businesses. The standard payment term implied by the law is 30 days, unless you've mutually agreed on a different term (which cannot typically exceed 60 days unless it's fair to both parties).

Statutory Interest Explained

The interest you can charge is called "statutory interest". The formula is simple but has a variable component:

Statutory Interest = 8% + the Bank of England base rate

The Bank of England base rate changes periodically, so you will need to check what the relevant rate was for the period your debt was late. You can find the historic and current base rates on the Bank of England's website. You charge this interest on a daily basis.

Here’s a worked example:

• Invoice amount (including VAT): £2,000
• Payment terms: 30 days
• Date paid: 60 days after the invoice date
• Days overdue: 30 days
• Hypothetical Bank of England base rate: 5.25%

First, calculate the annual statutory interest rate: 8% + 5.25% = 13.25%

Next, calculate the annual interest on the invoice amount: £2,000 x 13.25% = £265.00

Finally, calculate the daily interest and multiply it by the number of days the payment is late: £265.00 / 365 days = £0.726 per day £0.726 x 30 days = £21.78

In this scenario, you would be entitled to claim £21.78 in statutory interest.

Fixed Sum Compensation

In addition to interest, the Act allows you to charge a one-off fixed compensation sum for the cost of debt recovery. The amount you can charge depends on the size of the outstanding invoice.

Invoice Value (excluding VAT)	Compensation You Can Claim
Up to £999.99	£40
£1,000 to £9,999.99	£70
£10,000 or more	£100

This compensation is chargeable per overdue invoice, not per customer. If a client has three separate overdue invoices of £500 each, you can claim £40 for each one, totalling £120 in compensation, plus the statutory interest on each.

The "Should You?" Question: Pros and Cons

Just because you have the legal right to charge these fees doesn't always mean you should. It’s a commercial decision that requires balancing your finances against your client relationships.

The Case FOR Charging Late Payment Fees

• Deters Late Payments: The mere existence of a late fee clause in your terms and conditions can be a powerful motivator for clients to pay on time. It signals that you take payment seriously.
• Compensates for Your Costs: Chasing invoices costs you time and money. It disrupts your cash flow, may force you to use an overdraft, and takes you away from income-generating work. The fees are designed to compensate for this real, tangible cost.
• Establishes Professional Boundaries: Consistently waiving your right to charge can inadvertently signal that your payment terms are flexible suggestions rather than firm deadlines. Enforcing them establishes you as a professional business with clear boundaries.
• Levels the Playing Field: Large businesses often have stringent payment terms and will not hesitate to apply late fees to their suppliers. Applying your own statutory rights simply puts you on an equal footing and discourages larger clients from using you as an unofficial credit line.

The Case AGAINST Charging Late Payment Fees

• Risk to Client Relationships: This is the biggest concern for most small businesses. Applying a fee, especially to a long-standing and otherwise good client who has made a rare mistake, can feel aggressive and may damage goodwill.
• Administrative Hassle: Calculating the interest, determining the correct compensation, and issuing a new, separate invoice for the fees all take time. For a small amount, you might decide the administrative effort isn't worth the return.
• Can Escalate a Simple Mistake: Sometimes an invoice is late due to a simple administrative error, a key person being on holiday, or a temporary system issue at the client's end. A polite reminder is often all that's needed, whereas an immediate penalty invoice can turn a minor issue into a dispute.
• May Not Be Worth It for Small Amounts: If an invoice is only a few days late, the statutory interest might amount to just a few pounds. Chasing this small sum could cost you more in time and goodwill than you would recover.

A Practical Framework for Deciding When to Charge

The decision to charge late fees shouldn't be a blanket "yes" or "no". A better approach is to have a clear, tiered internal policy that guides your actions. This allows for flexibility while ensuring you remain in control.

Step 1: Set Clear Expectations from the Start

The best way to handle late payments is to prevent them. This starts with your initial engagement.

• Include it in Your Terms: Your contract or terms and conditions should clearly state your payment terms (e.g., "Payment due within 14 days of invoice date"). You should also include a clause stating that you reserve the right to charge interest and compensation on overdue invoices as per the Late Payment of Commercial Debts (Interest) Act 1998. Even though it's your statutory right, stating it upfront removes any surprise.
• Display it on Your Invoices: A simple footer on your invoice can reinforce the message: "Payment is due within X days. We reserve the right to claim statutory interest and compensation for late payment."

Step 2: Implement a Tiered Chasing Process

Don't jump straight to charging a fee the day after an invoice is due. Use a measured escalation process.

• Tier 1: The Gentle Reminder (1-7 Days Overdue): The first follow-up should be friendly and assume a simple oversight. A polite email asking if they've received the invoice and when you can expect payment is usually enough. Automating this first step with a tool like InvoiceReminder can ensure it happens consistently without any manual effort, keeping the process polite and professional from the outset.
• Tier 2: The Firmer Follow-up (8-21 Days Overdue): If the first reminder is ignored, your tone should become a little firmer. Re-send the invoice and state that it is now overdue. You can mention that your payment terms include the right to add late payment charges, which you may apply if the invoice remains unpaid.
• Tier 3: The Formal Notice of Intent (22-30 Days Overdue): At this stage, the payment is significantly late. Send a formal email or letter stating that the invoice is now considerably overdue and that if payment is not received by a specific, final deadline (e.g., within 5 working days), you will be adding statutory late payment charges to the outstanding balance.
• Tier 4: Applying the Charges (30+ Days Overdue): If the final deadline passes without payment, it's time to act on your warning. Calculate the charges and issue a new invoice for them.

This tiered approach gives the client multiple opportunities to pay and shows you have been reasonable. You only apply charges as a last resort, which is much easier to justify.

How to Correctly Calculate and Invoice for Late Payment Charges

If you reach the stage of applying charges, it's crucial to do it correctly to maintain a professional standing.

1. Confirm Eligibility: Double-check that the transaction is B2B and that your own contractual terms don't prevent you from charging these specific fees.
2. Calculate the Days Overdue: Count the number of days between the due date and the date you are issuing the charge invoice.
3. Find the Correct Base Rate: Go to the Bank of England's website and find the base rate that was in effect on the due date of your invoice.
4. Calculate the Total Interest: Use the formula: (Invoice Total x (8% + Base Rate)) / 365 x Days Overdue.
5. Determine the Fixed Compensation: Use the table above to find the correct £40, £70, or £100 sum based on the original invoice value.
6. Issue a New Invoice: Do not simply add the fees to the original invoice. This creates messy accounting. Instead, create a brand new, separate invoice for the charges.
   • Line Item 1: "Statutory late payment interest for Invoice [Original Invoice Number]". List the calculated interest amount.
   • Line Item 2: "Statutory debt recovery compensation for Invoice [Original Invoice Number]". List the £40/£70/£100 amount.
   • These charges are outside the scope of VAT, so you do not add VAT to them.
   • Set the due date for this new invoice as "Payable Immediately".

Send this new invoice to the client with a brief, factual cover email explaining what it is for, referencing your previous communications.

What If They Still Don't Pay?

If a client ignores the invoice for the late payment charges, and still hasn't paid the original bill, you are entering formal debt recovery territory. Your next steps would typically be:

• Letter Before Action: A formal letter, often sent via a solicitor or debt collection agency, outlining the total debt (original invoice + charges) and stating your intention to begin court proceedings if it is not paid by a final deadline.
• Small Claims Court: For debts up to £10,000 in England and Wales, you can use the government's simple online court process to get a County Court Judgment (CCJ) against the client.

At this point, the relationship is likely unsalvageable. The focus shifts purely to recovering the money you are owed.

Frequently Asked Questions

Can I charge late payment fees to consumers (B2C)?

Generally, no. The Late Payment of Commercial Debts (Interest) Act 1998 specifically applies to business-to-business transactions. For consumer contracts, you can only charge interest if you have a clear clause in your terms and conditions that the customer agreed to, and the rate must be fair and reasonable.

Do I have to mention late fees in my contract to be able to charge them?

For B2B transactions in the UK, you do not need a clause in your contract to claim statutory interest and compensation. This is your legal right under the 1998 Act. However, it is highly recommended to include a clause as it manages expectations and serves as a deterrent from the outset.

Is the fixed compensation sum (£40/£70/£100) inclusive of VAT?

No. HMRC guidance states that statutory compensation for late payment is outside the scope of VAT. You should not charge VAT on this amount when you invoice for it.

Can a client refuse to pay statutory late payment charges?

A client can refuse to pay anything, but that doesn't mean they are right. If you have correctly applied the charges under the 1998 Act for a B2B debt, you have a legal right to the money. Their refusal simply means you may have to enforce that right through the Small Claims Court.

Can I set my own late payment fee instead of the statutory one?

You can, but it needs to be a "substantial remedy" as defined by the Act and written into your contract. This means it must be fair and provide adequate compensation. If your contractual fee is deemed insufficient or unfair, a court can set it aside and revert to the statutory amounts. For most small businesses, sticking to the statutory interest and compensation is the simplest and most legally sound option.

Automating Your Way to Better Cash Flow

Chasing overdue invoices is one of the most draining tasks for any small business owner. The time spent sending follow-ups is time you can't spend on growing your business. More importantly, inconsistent chasing sends the wrong message to clients.

This is where automation can be a game-changer. InvoiceReminder connects to your Xero, QuickBooks, Sage, or FreeAgent account and automates the entire chasing process. You can set up a sequence of polite, professional email reminders that are sent automatically when an invoice becomes overdue, escalating from a gentle nudge to a firmer notice according to your rules. This ensures every late invoice is followed up on time, every time, without you lifting a finger. It helps you get paid faster and frees you up to focus on what you do best.

The Free plan currently includes unlimited email reminders at no cost, with no card required to sign up. InvoiceReminder is built by the team behind WeCovr, a trusted UK company authorised and regulated by the Financial Conduct Authority, which has helped arrange over 1,000,000 insurance policies.